Here is a list of jug bands that recorded in the 20's and 30's that i have read about or heard about somewhere in my constant searching. Very few of them have i actually heard but i know their recordings exist. I'll keep looking.

Picaninny Jug Band
Jolly Jug Band
Scorpion Washboard Band (c.1933)
The Red devils (1930-1931)
Salty Dog Four
Rhythm Willie and his gang
The Five Harmaniacs
Memphis Mudcats
Bobby Leecan & his Need More Band
Uncle Dave Macon & his Fruit Jar Drinkers
Georgia Crackers
A.A. Gray & Seven Foot Dilly
Tweedy Brothers

My own pleasure is to also be interested in novelty bands such as the Hoosier Hotshots. Any other bands like them?